Spring mattress



Dec. 29, 1931.

E. SJOSTRAND ET AL SPRING MATTRESS Filed May 1, 1930 2 Sheets-Sheet 1 E15 7 0.3 Fra 71c! L J'Seyfirour W (1W 2 Sheets-Sheet 2 gwuewtorj l \H lE 22570 776172! I L, J eymour s51, Wm M 'Dec. 29, 1931- E SJOSTRAND ETAL SPRING MATTRESS Filed May 1, 1950 Patented Dec. 2 9, 1931 UNITEDSTATES PATENT orrlcr ERICK SJ'OSTRAND AND LAWRENCE J. SEYMOUR, OFWASECA, MINN 1115012 3- SPRING. vmrtrnnss Application filed May 1,

This invention relates to spring mattresses and particularly to a springmattress which includes a frame adapted to be mounted on or supported bythe bed frame itself.

The present invention designs to provide a spring mattress whichentirely does away with the use of coiled bedsprings, particularly thevertical bed springs wherein double coils are used, one inside of theother, which are unsanitary and prevent proper cleaning from lint anddust.

A further object is to provide a spring mattress which has all theresiliency of the presentcoil spring construction and atthe same timeeliminates the use of these coiled springs. r

' A further object is to provide a spring mattress which includes doubleacting brack ets on each corner of the mattress which suspends'themattress fabric and which is resiliently connected to an under frame,which in turn is supported upon the bed frame proper. r

A further object is to provide means whereby all side sway of themattress is prevented without restricting its resiliency.

A further obj ect is to provide means whereby the upper fabric of thespring mattress may be tensioned from time to time.

Other objects will appear in the course of the following description. 1

Our invention is illustrated in the accompanying drawings, wherein VFigure 1 is a side elevation of a spring mattress constructed inaccordance with our invention Figure 2 is an end elevation of-the same;

Figure 3 is a fragmentary detailedplan view of one corner of the underframe of the mattress; l

Figure 4 is a vertical sectional view of one of the supporting bracketsand a portion of the connecting rod;

Figure 5 is an-under side elevation of the bracket shown in Figure 4:.

Our improved mattress includes in its construction, the end angle irons10. These end angle irons are designed to be connected to the fabric 11,which is preferably of wire, by means of springs 12 having hooks attheir 1930. Serial No. 449,034.

ends engaging respectively in the end angle iron and in the fabric.Attached to each angle iron 10 by the pins 14 are the brackets 15, thesebrackets as illustratedin Figure 5 being each formed with a middlecircular socket 16 and two legs 17 and 18. V

The legs are open on their inside faces and the legs are cut away at 19so as to reduce the weight of metal as much as possible. The leg 18, itwill be seen, is angulariy disposed with reference to the leg 17 of thebracket. The leg 1? at its upper end isconnected by pins 14 aspreviously described to the angle iron 10. There are preferably two ofthese brackets for each angle iron 16, the brackets beinglocatedadjacent the ends of the iron 10. There are two of these brackets,therefore, at each end of the mattress and these brackets are connectedbytwo longitudinally extend ing tubular rails 26 formed of metal pipe,the rails being inserted within the sockets 16 and being screw-threadedat their ends for engagement with the lock nuts 21 which bear againsttheends of the sockets 16. By turning these lock nuts in one direction orthe other, it is possible to force the brackets away f om each other orpermit the brackets to move inward toward each other,

Disposed on a level below the tubular rails is an under frame,rectangular in plan view and formed of angle irons, the angle ironsbeing designated 22. This frame is less in area than the area oftheframe defined by the end angle irons and the fabric and the corners ofthe under frame are braced by the corner braces 23 riveted to the angleirons.

The lower ends of the brackets are formed to provide inwardly projectingflanges or webs 24: and are perforated for engagement by the hooked endsof a plurality of coiled contractile springs 25 shown as three innumher. the opposite ends of the springs being hooked and engaged withperforations 26 in the end angle irons 22 of the under frame. Theseangle irons 22 are provided with angular'hangers 27 which are adaptedtoenover the angle iron bed ra is of a metal bed frame.

If a mattress is intended-to be supported upon a bed frame of Woodhaving slats 29, then this under frame rests upon these slats.

It will be seen that with this construction the under frame supports themattress by engagement with the bed frame, that the brackets aresupported from the under frame by the highly tempered tension springsand that the end angle irons and the brackets C3,). not move inwardtoward each other because they are held apart by the tubular side rails20. Thus the mattress is suspended by the springs 25. Inasmuch as thereare three of these springs at each corner, the mattress is held from anyswaying movement as any latteral movement will be resisted by theangularly disposed springs 25 while all three of the springs 25 willyieldingly resist the downward movement of the mattress. The fabric 11is supported at intervals by the springs 12. By turning up on the nuts21, the brackets and, of course, the end angle irons 10 may be forcedaway from the brackets and angle iron at the opposite end of the bed andthus the mattress may be tensioned to any desired amount.

The desirability of this mattress lies wholly in the suspension of thetop element of the mattress (the fabric 11 and the springs 12) from theunder frame, this construction giving the same resiliency as the presentcoiled springs give but eliminating a great number of coils andnoise-making wearing parts. This mattress can be used equally as well ona wooden bed as on an iron bed. T he brackets are preferably made ofcast aluminum alloy in order to secure lightness of the spring over castiron brackets.

Obviously the tubular side rails 20 may h ave threaded engagement withthe socket l6 and thus by rotating the tubular rails 20, the bracketsmay be forced further apart from each other or allowed to come towardeach other, but we prefer the construction illustrated in Figure l \i'her e' the sockct 16 is unscrew-threaded as regards its interior face.lVe do not wish to be limited, however, tothe use of a screw-threadedrail 20, though. this provides for adjustment from time to time. It isnecessary that the lower leg 18 of the bracket 15 be angularly disposedwith relation to the upper portion in order to prevent the lower endbracket coming in contact with any portion of the bed as may possiblyhappen with a bow end bed or a straight wooden bed. Obviously, however,we do not wish to be limited to this particular formof bracket.

We claim 1. A spring mattress including a plurality of normally uprightsupporting brackets at each end of the mattress, upper end membersconnected to the upper ends of the brackets, a fabric web resilientlyengaged at intervals with the upper end members, a rigid under frameadapted to rest upon a bed frame,

springs yieldingly connecting the lower ends of the brackets to theunder frame, and longitudinally extending rails disposed in a planebetween the under frame and the fabric web extending between thebrackets at opposite ends of the mattress and holding said brackets frominward movement, each bracket having a socket intermediate its ends andloosely receiving the extremity of the rail, each ex termity of the railbeing screw-threaded and nuts engaging the screw-threads and bearingagainst the corresponding brackets whereby the brackets may be forcedfurther from each other or permitted to move toward each other to thustension both the upper and lower springs.

2. A mattress of the character described, comprising end angle irons, aplurality of brackets attached to each angle iron and extending dovnwardtherefrom, each bracket being formed with a. medially disposed socket,longitudinally extending rails loosely engaged in the sockets ofopposite brackets, and screw-threaded nuts engaging said threads andbearing against the brackets, a rigid rectangular under framc less inlength than the distance between the end angle irons and brackets andhaving means whereby it may be engaged with the bed frame and supportedthereon, coiled contractile springs connecting said under frame to thelower ends of said brackets, a fabric web, and coiled contractilesprings connecting said fabric web with the first named angle irons.

3. A mattress of the character described. comprising end angle irons, aplurality of brackets attached to each angle iron and extending downwardtherefrom, each bracket being formed with a medially disposed socket,longitudinally extending rails loosely ongaged in the sockets ofopposite brackets. and screw-threaded nuts engaging said threads andbearing against the brackets, a rigid rectangular under frame less inlength. than the distance between the end angle irons and brackets andhaving means whereby it may be engaged with the bed frame and supportedthereon, a plurality of horizontally disposed coiled contractile springsconnecting the lower end of each bracket to the adjacent end of theunder frame, certain of the springs being disposed in divergent relationto each other to thereby counter-act lateral sway, a fabric web, andcoiled contractile springs connecting said fabric web with the firstnamed angle irons. V

In testimony whereof we hereunto aflix our signatures.

ERICK SJOSTRAND. LAWRENCE J. SEYiLlOUR.

